package com.rui.test2;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class C {
    public static void main(String[] args) {

        Data3 data3 = new Data3();

        new Thread(() -> {
            for(int i = 0 ; i < 10 ; i++){
                data3.printA();
            }
        },"A").start();

        new Thread(() -> {
            for(int i = 0 ; i < 10 ; i++){
                data3.printB();
            }
        },"B").start();

        new Thread(() -> {
            for(int i = 0 ; i < 10 ; i++){
                data3.printC();
            }
        },"C").start();
    }
}

class Data3 {

    private Lock lock = new ReentrantLock();

    private Condition condition1 = lock.newCondition();
    private Condition condition2 = lock.newCondition();
    private Condition condition3 = lock.newCondition();
    private int number = 1; //1A ,2B ,3C

    public void  printA() {
        lock.lock();
        try {
            //业务代码
            while (number != 1){
                //等待
                condition1.await();
            }
            System.out.println(Thread.currentThread().getName() + "=> AAAAA");
            //唤醒，指定的人 B
            number = 2;
            condition1.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

    public void  printB() {
        lock.lock();
        try {
            //业务代码
            while (number != 2){
                condition2.await();
            }
            System.out.println(Thread.currentThread().getName() + "=> BBBBB");
            number = 3;
            condition2.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

    public void  printC() {
        lock.lock();
        try {
            //业务代码
            while (number != 3){
                condition3.await();
            }
            System.out.println(Thread.currentThread().getName() + "=> CCCCC");
            number = 1;
            condition3.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
}
